Jill's Puzzle

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Across
  1. 1. where do electricity flows?
  2. 5. keep heat in or heat doesn't pass through easily
  3. 6. characteristic of physical changes
  4. 9. properties of metal
Down
  1. 2. formation of a new substances
  2. 3. conceal one's identity
  3. 4. example of physical changes
  4. 7. insulator blocks ____ flow
  5. 8. example of a conductor